Writing instrument



FIG. 1 is a side view of the writing instrument of the presentapplication taken from the left side of the writing instrument as shownin FIG. 4;

FIG. 2 is a back view of the writing instrument;

FIG. 3 is a side view of the instrument taken from the right side of thewriting instrument as shown in FIG. 4;

FIG. 4 is a front view of the writing instrument;

FIG. 5 is a bottom view of the writing instrument; and,

FIG. 6 is a top view of the writing instrument.

The ornamental design for a writing instrument, as shown and described.